Drill.



F. R. WEATHERSBY.

DRILL.

APPLIGATION FILED MAYlo, 1913.

1,102,112, Patented June 30,1914.

WIM/3358 BVM 4 mon/vers 1,077,772 my more particular purpose loeing y Toall whom 'it may concern smrns PATE l FRELVBICHARD WEATHERSBY, FHICOUBITONLTEXAH,

DRILL.

'Bpeoltlcation of Letters Patent. Pinted Jun@ 30, 19.121.

Application mea my io, 1913. semina messer.,

`Be it known that I, Fnnn R. Wm'rnnnsny, n citizen ofthe UnitedStates,`and e resident oi.4 Houston, in the county 0f Harrisimd Stateof. Texas, have made certain new 'and useful Improvements in Drills,of'which `the following is e specicetion. My invention relates todrills'of the'genh eral ty e disclosed in my pending 'application 1913,undv patented November. 4, 1913, No.

to )rovide an improved form of shank, to

vget er 4with en improvedform of disk `deitnchably y connectedtherewith, and menns for connecting e disk or cutter witlrthe islcg; nl' .My invention" furth'er-4 contemplates im. i

proved mechanism for ,holding the disk upon-the shank and for preventingundesii-able movements of the'cutter relatively .to the disk.

My improved drill is specially adapted for earth boring, but meyfbeemployed in various other relations.

Reference is made. `to@the.fleeompanying drawing forn'iing;r a partofthis specifica- @wml-.111 which like letters, indice@ like" parts. ll. Figure 1 is `an elevation showin, my imroved drill, consisting of thes erik,` the disk and the cutter, these parts "being connected, readyfor practical use. Fig. .2 isn. section on the line 2-2 of Fi 3, looklng1n` ig. 3 is a secl," looking in the direction ofthe arrow, and showingthe proximate lower halfof the drill. Fig. 4 is a detail showing inperspective for holding the cutter. Fig. 5 is a perspective of edifferent form of lmy drill.

The shank is shown at 5 and the diskV at the direction of the arrow.

6. lThe shank is provided with a. slot 7l and.

the diskl is provided with a Vtongue 8 adapted to fit neatly into saidslot. A bolt 9 providedv with a head 10 and with a threaded portion 11extends in the general direction of the axes of the disk 6 and theshank" 5,'

as indicated in F ig'. 2, and is used for holding lthe disk upon theshank. The d isk is provided with u. slot l2 and with a recess 13 intowhich the slot merges, the recess serving ne n sink for the head 10. Anut 14 is revolu'bly mounted upon the threaded portion 11, and occupiesa recess l5 at the .with

umher 744,139, filed January. Q5,

"thickness of the the disk shank, considered as munit, ereprovided waterthrough them in. the 'general directioiifnof their common length.v Forthe purposerof iiclrcommodntingthe bolt 9, the disk' -ispro vided.iwith4 .a.-hole-"1T Iwhichfcontinues 'through the tongue Set-as' willbe' understood finn1.Fi.4.. 'l

A cutterds .showsist 18 4Middelgilpvieienll with chumfered edges19,'.andI a. with pilotA blades-20.xintegrahwith .thefcutten Thesepilotblades .extend 'downwardly .bee

-yond -thechamfered edges 19 und are ed t0.bite into asrock-or other"hard lsuhadapt.

stance. so as to cut `e'groove*therein and thus steudy the drill bydiminishing its 1inbility to be'pushed laterally out of its generalvertical .path of'travel while-jin action. Thecutter 18 has n maximumwidth greater than the thickness of theshzmk 5, and also ,greater thanthe diametrical thickness of the disk.6, which.is thesnme 11s-thediametrical shank. l.The cutter 18 curries ,twol 'stems21 'preferablyintegral f with it. These stems,l nt'their outer ends, lare providedwith threads 22nnd are adapted ,'vided with two recesses 24 into whichthe .1s provide The disk is further proholes 23 merge. Housed within therecesses 24ore nuts 25 which nre fitted upon the threaded portions 22 ofthe stems 21, and are thus countersunken within the disk.

The disk 6 is provided with two holes 26, one of which is shown in Fig.4, and extendingthrough these'holes are bolts 27 which are providedwith'threaded portions 28, and with heads 29.v These heads ere locatedin recesses with which the disk 6 is provided, and are thus housedwithin the disk.

Thethreaded portions 28 of the bolts 27` holes' 16V extending entirely`upper ofthe shank. The disk andthe smaller bolts 27, which ll termauxiliary fastening bolts still further secure the disk relatively tothe stem. With this drill, v if through accident the tongue 8 shouldbecome broken, the fastening bolts 2 7 tend to hold the parts inposition, and even if these bolts be broken or twisted oil1 themain-fasteningy bolt 9, continues vto hold the parts. By virtue of theaxial location of the'main fasten'- ing bolt 9, andof theefective'protection' aorded tothe head 10" and the nut lfiby sinkingthese members, the bolt 9. tends to prevent the complete severance oflthe Adisk from the shank, even if the drill be disabled so badly as tobecome useless. ment of the various parts is such 4that While the drillis in action', Water may be fed action.

not employ a'disk. The shank 4appears at,

through the Water holes 16.. i

The cutter 18, havlng'a maxlmum Awidth greater than the diameter of thedisk` or that oi the shank, prevents theshank or disk from binding' orbecoming clogged while in lin the form shown in Fig. 5I do 31 and visprovided with Water holes'32 and with a s101133. A cutter isshovvn at 34and is provided with cutting. edges 135 and with pilot blades 36. rlFhecutter is further provided vvith a stem 37 which extends through a holein the ushank-'and'is secured by a nut' 38, the latter being housed' inasink 3 9.'

nl do not limit myself to the precise mechanisin shown as variations'may bemade *therein Without departing fronithe vvspirit of myinvention, the scope of which is commeneurate with my claims..

rlhe arrangeshank to assist 'in mainta Licentie l claim u' A1. llnadrill, the combination of ashank provided `vvitha slot at one end andwith a hole extending axially therethrough' and merging at one end in tothe slot,- the oppo' site 'end of the shank being provided With ai sinksurrounding .the adaoent end of the hole', said shank being a soprovidedwith Water holes extending longitudinally throughout its' entire lengthanddisposed parallel with Voney another upon diametrically oppositesides of' its hole, a cutter fitted into the slot ajt lone end of theshank and provided with an integral stern extending through the said.hole, and a nut threaded upon the op posits end of the stem and disposedlWithinthe sink at the adj aoent end of the shank, all for'the purposedescribed.

2. ln a drill the combination of a shank provided with a hole 'extendingaxially therethrough from end 'to end to receive a connecting memberfandWith -Water holes alsoextending therethrough from end to arallel AWithone another end and located and upon diametrically opposite sides of theaxial hole, said shan'kbeing slotted at one end, a cutter mountedadjacent the slotted

